142335521 has 2 divisors, whose sum is σ = 142335522. Its totient is φ = 142335520.

The previous prime is 142335503. The next prime is 142335533. The reversal of 142335521 is 125533241.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72863296 + 69472225 = 8536^2 + 8335^2 .

It is a cyclic number.

It is not a de Polignac number, because 142335521 - 2¹⁴ = 142319137 is a prime.

It is not a weakly prime, because it can be changed into another prime (142335541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71167760 + 71167761.

It is an arithmetic number, because the mean of its divisors is an integer number (71167761).

Almost surely, 2^142335521 is an apocalyptic number.

It is an amenable number.

142335521 is a deficient number, since it is larger than the sum of its proper divisors (1).

142335521 is an equidigital number, since it uses as much as digits as its factorization.

142335521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 26.

The square root of 142335521 is about 11930.4451300025. The cubic root of 142335521 is about 522.1209246524.

Adding to 142335521 its reverse (125533241), we get a palindrome (267868762).

The spelling of 142335521 in words is "one hundred forty-two million, three hundred thirty-five thousand, five hundred twenty-one".